| (19) |
 |
|
(11) |
EP 1 043 373 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
04.04.2001 Bulletin 2001/14 |
| (43) |
Date of publication A2: |
|
11.10.2000 Bulletin 2000/41 |
| (22) |
Date of filing: 05.04.2000 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
07.04.1999 JP 9988999
|
| (71) |
Applicant: NITTO DENKO CORPORATION |
|
Ibaraki-shi, Osaka 567-8680 (JP) |
|
| (72) |
Inventors: |
|
- Nakamura, Koichi
Ibaraki-shi, Osaka 567-8680 (JP)
- Yamamoto, Hiroshi
Ibaraki-shi, Osaka 567-8680 (JP)
- Amano, Tatsumi
Ibaraki-shi, Osaka 567-8680 (JP)
- Shibata, Kazuhiko
Ibaraki-shi, Osaka 567-8680 (JP)
- Harada, Chiaki
Ibaraki-shi, Osaka 567-8680 (JP)
|
| (74) |
Representative: Forstmeyer, Dietmar, Dr. rer. nat., Dipl.-Chem. et al |
|
Boeters & Bauer, Bereiteranger 15
81541 München
81541 München (DE) |
|
| |
|
| (54) |
Pressure sensitive adhesive material |
(57) A pressure-sensitive adhesive material comprises a pressure-sensitive adhesive layer
comprising 100 parts by weight of natural rubber and 10 to 120 parts by weight of
styrene-isoprene-styrene block copolymer (SIS) having a radiate configuration with
a styrene content of 10 to 45% by weight. Preferably, the pressure-sensitive adhesive
layer is free of metals or metal compounds. The pressure-sensitive adhesive layer
may contain 5 to 150 parts by weight of a tackifier having an acid value of 1.5 or
more. The pressure-sensitive adhesive material includes (A) a backing-less tape having
a release liner having on one surface thereof the pressure-sensitive adhesive layer
and (B) a double-coated tape having a backing having respective pressure-sensitive
adhesive layers on surfaces thereof, at least one of which is constituted by the pressure-sensitive
adhesive layer of the above-described type.